(redirected from helicoidally)
Also found in: Medical, Encyclopedia.
click for a larger image
a helicoid generated by rotating and translating a line at a constant rate about an axis to which it is perpendicular


 (hĕl′ĭ-koid′, hē′lĭ-)
Arranged in or having the approximate shape of a flattened coil or spiral.
n. Mathematics
A surface in the form of a coil or screw.

[Greek helikoeidēs : helix, helik-, spiral; see helix + -oeidēs, -oid.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) biology shaped like a spiral: a helicoid shell.
(Mathematics) geometry any surface resembling that of a screw thread
ˌheliˈcoidally adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhɛl ɪˌkɔɪd, ˈhi lɪ-)

1. coiled or curving like a spiral.
2. a warped geometric surface generated by a straight line moving so as to cut or touch a fixed helix.
[1690–1700; < Greek helikoeidḗs. See helix, -oid]
hel`i•coi′dal, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Mature multimers of VWF are packaged in helicoidally structures and stored in Weibel-Palade bodies (WPBs) in ECs and a-granules in MKs and platelets [7].
In this agenda, under a dialectical, tensional and helicoidally process, it's argued that the studies on bodies and emotions have been located "outside" of all empiricist and objectivist view on objects and procedures of a suitable and acceptable disciplinary field.
Fibre helicoidally rounding hole of tumblebug's elytra and extrusion strength of biomimetic composite, Mater.
To ascend there from the prayer hall through a small door there is a stair with ninety helicoidally steps in triangular form spiraled on a perpendicular axle.
Lakhtakia, "On percolation and circular Bragg phenomenon in metallic, helicoidally periodic, sculptured thin films," Microwave Optical Technology Letters, vol.
Trichoblasts helicoidally arranged, with one basal cell 90-100 [micro]m long and 15-20 [micro]m in diam.
Experiment revealed that pulses of ionic charges propagate along surface of helicoidally wound threads of actin filaments preserving stable localized shape.
Such twist on the sheaf leads to the formation of spiral, which can be observed in helicoidally twisted crystallites with a perfect spherulite around them.
The holes were arranged helicoidally so that there were no interferences among the sample collections.